R.K. Jain's Customs Tariff, IGST & Foreign Trade Policy — Rate Reckoner (with Supplement on Mega Exemption Notifications, October 2025) is a three-volume, practitioner-focused reference that unifies the Customs Tariff, IGST, and FTP frameworks into one integrated resource. The 4th Edition (2025–26) incorporates the landmark Mega Exemption reform, as outlined in Notifications 44 & 45/2025-Cus., consolidating 31 earlier exemption notifications into a single, simplified structure. Covering every 8-digit HSN with total duty computation, policy notes, and GST/FTP linkages, it delivers unmatched accuracy and clarity. Edited by CA Kishore Harjani, the set includes a complimentary Customs Tariff Tool (worth ₹5,000) for instant HSN validation and real-time duty calculation.